Individual and Junior Members

Professional scientists whose research is directly relevant to some branch of astronomy are eligible to apply as Individual Members. Individual Members are, normally, admitted by the Executive Committee on the proposal of a National Member.

Junior scientists who have completed their PhD studies between 2015 and 2020 and who are in the initial phase of the career of a professional researcher in some branch of astronomy or a related field may be admitted to the Union by the Executive Committee as Junior Members, for a period not exceeding 6 years.

Individual and Junior Members listed in the IAU Directory have a valid, public email, and are affiliated to at least one Division. They are labeled as "Active Members". For corrections and updates, please contact Any members remaining Inactive for more than 3 years will be removed from the IAU lists.

Additionally, while only Active Members are listed in the IAU Directory, you may still search for Active, Inactive or Deceased Members in the search field to your right.

For gender statistics click here.

Total number of IAU Individual and Junior members: 12754 (of which 1224 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 12383.


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Name▼ Location NCA adherence
YI, Sukyoung Ken Korea, Rep of Korea, Rep of
YI, Yu Korea, Rep of Korea, Rep of
Yildiz, Mustafa Kursad (Junior Member) Turkey Turkey
Yildiz, Umut United States United States
YILDIZ, MUTLU Turkey Turkey
YIM, Hong Suh Korea, Rep of Korea, Rep of
YIM, Kijeong Korea, Rep of Korea, Rep of
YIN, Dongshan (Junior Member) China, Nanjing China, Nanjing
YO, Hwei-Jang China, Taipei China, Taipei
YOICHIRO , Suzuki Japan Japan
YOKOSAWA, Masayoshi Japan Japan
Yokoyama, Tadashi Brazil Brazil
YOKOYAMA, Jun'ichi Japan Japan
YOKOYAMA, Takaaki Japan Japan
YONEHARA, Atsunori Japan Japan
YONEKURA, Yoshinori Japan Japan
YONETOKU, Daisuke Japan Japan
Yong, David Australia Australia
Yong, Suk Yee (Junior Member) Australia Australia
Yoon, Hyein (Junior Member) Australia Australia
YOON, Suk-Jin Korea, Rep of Korea, Rep of
YOON, Sung-Chul Korea, Rep of Korea, Rep of
YOON, Tae-Seog Korea, Rep of Korea, Rep of
York, Donald G. United States United States
Yorke, Harold W. United States United States
YOSHIDA, Fumi Japan Japan
YOSHIDA, Haruo Japan Japan
YOSHIDA, Hiroshi Japan Japan
YOSHIDA, Michitoshi Japan Japan
YOSHIDA, Shin'ichirou Japan Japan
YOSHIDA, Takashi Japan Japan
YOSHIDA , Atsumasa Japan Japan
YOSHIDA , Shigeomi Japan Japan
YOSHII, Yuzuru Japan Japan
YOSHIKAWA, Kohji Japan Japan
YOSHIKAWA, Makoto Japan Japan
YOSHIMURA, Hirokazu Japan Japan
YOSHINO, Kouichi Japan Japan
YOSHIOKA, Kazuo Japan Japan
YOSHIOKA, Satoshi Japan Japan
Young, Andrew James United Kingdom United Kingdom
Young, John Stephen United Kingdom United Kingdom
Young, Lisa Marie United States United States
Young, Mitchell E. (Junior Member) Austria Canada
Young, Peter R United States United States
Younsi, Ziri United Kingdom United Kingdom
youssef, manal Hanafi Ahmed Egypt Egypt
Yseboodt, Marie Belgium Belgium
YU, Cong China, Nanjing China, Nanjing
YU, Dae Jung Korea, Rep of Korea, Rep of
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